This photo taken on September 11, 2026 shows a staff member checking the cooling system at Punggol Digital District in Singapore. Long dubbed an "air-conditioned nation", Singapore is experimenting with cooling alternatives from chilled beams to "passive displacement" to curb its thirst for energy-guzzling air-conditioning. (Photo by Roslan RAHMAN / AFP via Getty Images) / TO GO WITH AFP STORY: 'Singapore-Environment-Economy-Heat' Focus by Taryn NG